package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        String name = categoryPageQueryDTO.getName();
        Integer type = categoryPageQueryDTO.getType();
        int page = categoryPageQueryDTO.getPage();
        int pageSize = categoryPageQueryDTO.getPageSize();
        //统计符合条件数量
        Long sum=categoryMapper.select(name,type);
        //查询范围内数据
        List<Category> data  = categoryMapper.selectPage(name,type,(page-1)*pageSize,pageSize);

        return new PageResult(sum,data);
    }

    /*
    * 新增分类
    * */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        //补全分类信息
        category.setStatus(StatusConstant.DISABLE);
        /*category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.insert(category);
    }

    /*
     * 开启/关闭某分类
     * */
    @Override
    public void stratOrStop(Integer status, Long id) {
        Category category = new Category();
        category.setId(id);
        category.setStatus(status);
        /*category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());*/
        categoryMapper.update(category);
    }

    /*
    * 删除分类
    * */
    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteById(id);
    }



    /*
    * 根据分类查询数据
    * */
    @Override
    public List<Category> find(Category category) {
        return categoryMapper.selectCategory(category);
    }


    /*
    * 新建分类
    * */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        //补全分类信息
        /*category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.update(category);
    }



}
